TPS56637: Max duty limitation at Vout=5V

Shinya Sawamoto

Part Number: TPS56637

Hello,

I'd like to know what the max duty limitation at Vout=5V should be, or in other words, how far Vin supply could be dragged down with keeping a stable Vout=5V.

I use it with 24V supply in normal mode and want to drop it lower in low power mode as far as possible.

Thanks in advance.
Sawamoto

over 6 years ago

0 Former Member over 6 years ago

Hi Sawamoto-san,

Please check the attachment for the min Vin that can hold 5V output.

To find VINmin that can hold 5Vout.xlsx

0 Sam(MPAA) Zhang over 6 years ago

TI__Mastermind 19080 points

Hi Sawamoto,

The min off time of TPS56637 is 300ns(max) from the datasheet. As it works at 500kHz, max duty could be (1-0.3/2), it's about 85%.

Regards,
Hao

0 Shinya Sawamoto over 6 years ago in reply to Sam(MPAA) Zhang

TI__Expert 5285 points

Thanks a lot, team!

Regards,
Sawamoto

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TPS56637: Max duty limitation at Vout=5V